参考网址:http://www.jianshu.com/p/8894a5a71b70

借图描述原理:

三、注册、登陆、聊天功能的实现

故事板如下:

四个类如下:

不喜多言,直接上Demo:

LoginViewController.h

#import "ViewController.h"
#import "XMPPManager.h"
#import "RosterViewController.h"
@interface LoginViewController : ViewController<XMPPStreamDelegate> @end

LoginViewController.m

#import "LoginViewController.h"

@interface LoginViewController ()
@property (weak, nonatomic) IBOutlet UITextField *usernameTextField;
@property (weak, nonatomic) IBOutlet UITextField *passwordTextField; @end @implementation LoginViewController - (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
[[XMPPManager defaultManager].xmppStream addDelegate:self delegateQueue:dispatch_get_main_queue()]; }
- (IBAction)login:(UIButton *)sender {
NSLog(@"Click login button");
if (self.usernameTextField.text.length>&&self.passwordTextField.text.length>) { [[XMPPManager defaultManager] loginwithName:self.usernameTextField.text andPassword:self.passwordTextField.text];
}
}
-(void)xmppStreamDidAuthenticate:(XMPPStream *)sender{
NSLog(@"登陆成功");
RosterViewController *roster=[RosterViewController new];
[self.navigationController pushViewController:roster animated:YES]; }
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

RegisterViewController.h

#import "ViewController.h"
#import "XMPPManager.h"
@interface RegisterViewController : ViewController<XMPPStreamDelegate> @end

RegisterViewController.m

#import "RegisterViewController.h"

@interface RegisterViewController ()
@property (weak, nonatomic) IBOutlet UITextField *usernameTextfield;
@property (weak, nonatomic) IBOutlet UITextField *passwordTextfield; @end @implementation RegisterViewController
- (IBAction)register:(UIButton *)sender {
[[XMPPManager defaultManager] registerWithName:self.usernameTextfield.text andPassword:self.passwordTextfield.text];
}
- (IBAction)cancel:(UIButton *)sender {
[self.navigationController popViewControllerAnimated:YES];
}
-(void)xmppStreamDidAuthenticate:(XMPPStream *)sender{ NSLog(@"注册成功!!"); }
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
[[XMPPManager defaultManager].xmppStream addDelegate:self delegateQueue:dispatch_get_main_queue()]; } - (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

RosterViewController.h

#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>
#import "ViewController.h"
#import "XMPPManager.h"
#import "ChatViewController.h"
@interface RosterViewController : ViewController<UITableViewDataSource,UITableViewDelegate,XMPPRosterDelegate>
//存放所有好友的数组
@property(nonatomic,strong) NSMutableArray *rosterJids; @property(nonatomic,strong) UITableView *friendsView; @end

RosterViewController.m

#import "RosterViewController.h"

@interface RosterViewController ()

@end

@implementation RosterViewController

-(UITableView*)friendsView{
if (_friendsView==nil) {
_friendsView=[[UITableView alloc]initWithFrame:CGRectMake(, , self.view.frame.size.width, self.view.frame.size.height) style:UITableViewStylePlain];
_friendsView.dataSource=self;
_friendsView.delegate=self;
}
return _friendsView;
} #pragma mark friendView 代理方法 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
return ;
} - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
if (self.rosterJids.count>) {
return self.rosterJids.count;
}
return ; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *ide=@"cell";
UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:ide];
if (cell==nil) {
cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:ide];
}
XMPPJID *jid = self.rosterJids[indexPath.row];
cell.textLabel.text=jid.user;
return cell;
}
#pragma mark 删除好友执行的方法
-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{
if (editingStyle==UITableViewCellEditingStyleDelete) {
//找到要删除的人
XMPPJID *jid = self.rosterJids[indexPath.row];
//从数组中删除
[self.rosterJids removeObjectAtIndex:indexPath.row];
//从Ui单元格删除
[tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic ];
//从服务器删除
[[XMPPManager defaultManager].xmppRoster removeUser:jid];
}
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{ ChatViewController *chatVC=[ChatViewController new];
chatVC.chatToJid=self.rosterJids[indexPath.row];
[self.navigationController pushViewController:chatVC animated:YES];
} - (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
self.rosterJids = [[NSMutableArray alloc]init];
[[XMPPManager defaultManager].xmppRoster addDelegate:self delegateQueue:dispatch_get_main_queue()];
//
UIBarButtonItem *right=[[UIBarButtonItem alloc]initWithTitle:@"添加" style:UIBarButtonItemStylePlain target:self action:@selector(doAdd:)];
self.navigationItem.rightBarButtonItem = right;
[self.view addSubview:self.friendsView]; } //点击添加好友
-(void)doAdd:(UIButton*)sender{
XMPPJID *jid= [XMPPJID jidWithUser:@"admin" domain:@"" resource:nil];
//添加好友
[[XMPPManager defaultManager].xmppRoster subscribePresenceToUser:jid];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
} //#pragma mark XMPPRoster 的代理方法 #pragma mark 开始检索好友列表的方法
-(void)xmppRosterDidBeginPopulating:(XMPPRoster *)sender{
NSLog(@"开始检索好友列表");
}
#pragma mark 正在检索好友列表的方法
-(void)xmppRoster:(XMPPRoster *)sender didRecieveRosterItem:(DDXMLElement *)item{
NSLog(@"每一个好友都会走一次这个方法");
//获得item的属性里的jid字符串,再通过它获得jid对象
NSString *jidStr = [[item attributeForName:@"jid"] stringValue]; XMPPJID *jid = [XMPPJID jidWithString:jidStr];
//是否已经添加
if ([self.rosterJids containsObject:jid]) {
return;
}
//将好友添加到数组中去
[self.rosterJids addObject:jid];
//添加完数据要更新UI(表视图更新)
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:self.rosterJids.count- inSection:]; [self.friendsView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
} @end

ChatViewController.h

#import "ViewController.h"
#import "XMPPManager.h"
@interface ChatViewController : ViewController<XMPPStreamDelegate,UITableViewDataSource,UITableViewDelegate,UIImagePickerControllerDelegate,UINavigationControllerDelegate> @property(nonatomic,strong) XMPPJID *chatToJid; @property(nonatomic,retain) NSMutableArray *messages; @property(nonatomic,strong) UITableView *tableView; @end

ChatViewController.m

#import "ChatViewController.h"

@interface ChatViewController ()

@end

@implementation ChatViewController

- (void)viewDidLoad {
[super viewDidLoad];
self.title=self.chatToJid.user;
self.view.backgroundColor=[UIColor grayColor];
//初始化聊天数组
self.messages=[[NSMutableArray alloc]init];
//设置代理
[[XMPPManager defaultManager].xmppStream addDelegate:self delegateQueue:dispatch_get_main_queue()];
//
[self reloadMessage];
//
UIBarButtonItem *sendMessage=[[UIBarButtonItem alloc]initWithTitle:@"发送" style:UIBarButtonItemStylePlain target:self action:@selector(doSend)];
self.navigationItem.rightBarButtonItem=sendMessage;
[self.view addSubview:self.tableView];
}
-(void)doSend{
/*
//创建一个消息对象,并且指明接收者
XMPPMessage *message = [XMPPMessage messageWithType:@"chat" to:self.chatToJid];
//设置消息内容
[message addBody:@"呵呵呵呵呵呵呵呵呵呵啊啊啊啊啊啊"];
//发送消息
[[XMPPManager defaultManager].xmppStream sendElement:message];
//发送成功或者失败,有两种对应的代理方法
*/ UIImagePickerController *pick=[[UIImagePickerController alloc]init];
pick.delegate=self;
[self presentViewController:pick animated:YES completion:^{ }];
}
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
//获取相册里的图片
//UIImage *image=info[UIImagePickerControllerOriginalImage];
UIImage *image=[UIImage imageNamed:@"1.png"]; //转化成NSData
NSData *data=UIImagePNGRepresentation(image);
//发送
[self sendImageWithData:data andName:@"图片"]; //
[self dismissViewControllerAnimated:YES completion:nil];
}
-(void)sendImageWithData:(NSData*)data andName:(NSString*)name{
XMPPMessage *message= [XMPPMessage messageWithType:@"chat" to:self.chatToJid];
[message addBody:name];
//
NSString *base64Str=[data base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
//
XMPPElement *attachment=[XMPPElement elementWithName:@"attachment" stringValue:base64Str];
// [message addChild:attachment];
//
[[XMPPManager defaultManager].xmppStream sendElement:message];
}
-(UITableView*)tableView{
if (!_tableView) {
_tableView=[[UITableView alloc]initWithFrame:CGRectMake(, , , self.view.frame.size.height) style:UITableViewStylePlain];
_tableView.dataSource=self;
_tableView.delegate=self;
} return _tableView;
}
#pragma tableView delegate
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
return ;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return self.messages.count;
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{ return ; }
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
//NSLog(@"cell");
static NSString *cellIndentifier = @"cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIndentifier];
if (cell==nil) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:cellIndentifier];
}
//将聊天信息放到cell上
//拿到一个聊天消息
XMPPMessageArchiving_Message_CoreDataObject *message = self.messages[indexPath.row];
XMPPMessage *msg=message.message;
if (message.isOutgoing == YES) {
cell.detailTextLabel.text = message.body;
cell.textLabel.text=@"";
for(XMPPElement *node in msg.children){
NSLog(@"图片呢");
//取出消息
NSString *base64Str=node.stringValue;
//NSLog(@"%@",base64Str);
//base64转换成NSData
NSData *data=[[NSData alloc]initWithBase64EncodedString:base64Str options:];
UIImage *image=[[UIImage alloc]initWithData:data];
cell.imageView.image=image;
cell.imageView.frame=CGRectMake(, , , );
cell.imageView.backgroundColor=[UIColor redColor];
} }else{
cell.textLabel.text = message.body;
cell.detailTextLabel.text=@"";
}
// cell.imageView.backgroundColor=[UIColor redColor];
// cell.imageView.image=[UIImage imageNamed:@"1.png"];
return cell; } #pragma mark 聊天的代理方法
-(void)xmppStream:(XMPPStream *)sender didSendMessage:(XMPPMessage *)message{ NSLog(@"消息发送成功");
[self reloadMessage];
}
-(void)xmppStream:(XMPPStream *)sender didFailToSendMessage:(XMPPMessage *)message error:(NSError *)error{
NSLog(@"消息发送失败");
}
-(void)xmppStream:(XMPPStream *)sender didReceiveMessage:(XMPPMessage *)message{ NSLog(@"消息接受成功");
[self reloadMessage];
}
-(void)xmppStream:(XMPPStream *)sender didReceiveError:(DDXMLElement *)error{
NSLog(@"接收失败");
}
#pragma mark 刷新消息的方法
-(void)reloadMessage{
//得到上下文
NSManagedObjectContext *context = [XMPPManager defaultManager].messageArchivingContext;
//搜索对象
NSFetchRequest *request = [[NSFetchRequest alloc]init];
//创建一个实体描述
NSEntityDescription *entity = [NSEntityDescription entityForName:@"XMPPMessageArchiving_Message_CoreDataObject" inManagedObjectContext:context];
[request setEntity:entity];
//查询条件
NSPredicate *pre = [NSPredicate predicateWithFormat:@"streamBareJidStr = %@ AND bareJidStr = %@",[XMPPManager defaultManager].xmppStream.myJID.bare,self.chatToJid.bare];
request.predicate = pre;
//排序方式
NSSortDescriptor *sort = [[NSSortDescriptor alloc]initWithKey:@"timestamp" ascending:YES];
request.sortDescriptors = @[sort];
//执行查询
NSError *error = nil;
NSArray *array = [context executeFetchRequest:request error:&error]; if (self.messages.count != ) {
[self.messages removeAllObjects];
}
[self.messages addObjectsFromArray:array];
[self.tableView reloadData];
if (self.messages.count>) {
NSIndexPath *indexpath=[NSIndexPath indexPathForRow:self.messages.count- inSection:]; [self.tableView scrollToRowAtIndexPath:indexpath atScrollPosition:UITableViewScrollPositionTop animated:YES]; } } - (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
} @end

运行截图:(基本功能实现,具体细节还需要优化)

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